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2010 IEEE 72nd Vehicular Technology Conference - Fall最新文献

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Introduction to the Absolute Phase in Mobile Channels 移动信道中的绝对相位介绍
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594336
Jinyun Ren, R. Vaughan
{"title":"Introduction to the Absolute Phase in Mobile Channels","authors":"Jinyun Ren, R. Vaughan","doi":"10.1109/VETECF.2010.5594336","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594336","url":null,"abstract":"The absolute phase is the accumulated phase change over an observation interval. It is a new variable for the mobile channel and can be simply derived from the wrapped phase or from the quadrature components. The absolute phase offers extra information about the channel, fostering new techniques for channel characterization and location estimation. However, the absolute phase has not been used in mobile communications. In this paper, the absolute phase is introduced including its mathematical definition and two different formulations. The mean of the absolute phase is derived for the mobile channel with directional scattering, including isotropic scattering as a special case. Simulations are used to support the analysis and discussion.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134508648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
DFT-Based Channel Estimation and Noise Variance Estimation Techniques for Single-Carrier FDMA 基于dft的单载波FDMA信道估计和噪声方差估计技术
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594158
Gillian Huang, A. Nix, S. Armour
{"title":"DFT-Based Channel Estimation and Noise Variance Estimation Techniques for Single-Carrier FDMA","authors":"Gillian Huang, A. Nix, S. Armour","doi":"10.1109/VETECF.2010.5594158","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594158","url":null,"abstract":"Practical frequency domain equalization (FDE) systems generally require knowledge of the channel and the noise variance to equalize the received signal in a frequency-selective fading channel. Accurate channel estimate and noise variance estimate are thus desirable to improve receiver performance. In this paper we investigate the performance of the denoise channel estimator and the approximate linear minimum mean square error (A-LMMSE) channel estimator with channel power delay profile (PDP) mismatch and noise variance estimation errors for a single carrier frequency division multiple access (SC-FDMA) system. A windowed DFT-based noise variance estimator is also presented in this paper to improve A-LMMSE channel estimation as well as to facilitate the MMSE-FDE design. Results show that the proposed noise variance estimator remains unbiased up to a SNR of 50dB.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134153805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Design of Distributed and Autonomic Load Balancing for Self-Organization LTE 自组织LTE分布式自主负载均衡设计
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594567
Heng Zhang, Xue-song Qiu, Luoming Meng, Xidong Zhang
{"title":"Design of Distributed and Autonomic Load Balancing for Self-Organization LTE","authors":"Heng Zhang, Xue-song Qiu, Luoming Meng, Xidong Zhang","doi":"10.1109/VETECF.2010.5594567","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594567","url":null,"abstract":"Future LTE RAN will benefit from a significant degree of self-organization. Autonomic Load Balancing (ALB) is considered as an important function of self-organization for LTE RAN. A novel distributed method to achieve ALB for LTE RAN, AFWBM (Autonomic Flowing Water Balancing Method), is presented, which works by AFWBM module. The eNBs with AFWBM modules can detect their load conditions depending on self-monitoring actions. When overload conditions are detected, eNBs can adjust their HOM (handover hysteresis margin) and trigger handover behaviors of users automatically to balance load. Simulation results have demonstrated that by AFWBM, load of eNBs can be balanced and system capacity can be improved significantly.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134078770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 45
Cutoff Rate Analysis of Amplify-and-Forward Relay System 放大前向继电器系统的截止率分析
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594259
K. Yar, Sumei Sun, P. Ho
{"title":"Cutoff Rate Analysis of Amplify-and-Forward Relay System","authors":"K. Yar, Sumei Sun, P. Ho","doi":"10.1109/VETECF.2010.5594259","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594259","url":null,"abstract":"We derive in this paper the bit error probability and cutoff rate of an Amplify-and-Forward (AF) relay system operating in Rayleigh fast fading. In our model, we consider the relay thermal noise to be non-negligible and derive a closed form expression to approximate the bit error probability. Our approximated closed form expression matches well with simulation result. Using Chernoff bound, we upper bound its pairwise error probability and we also derive the cutoff rate of the AF relay system.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130357062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Robust Codebook Design Based on Unitary Rotation of Grassmannian Codebook 基于格拉斯曼码本酉旋转的鲁棒码本设计
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594070
Shaohua Li, Haiyan Jia, Jianfeng Kang
{"title":"Robust Codebook Design Based on Unitary Rotation of Grassmannian Codebook","authors":"Shaohua Li, Haiyan Jia, Jianfeng Kang","doi":"10.1109/VETECF.2010.5594070","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594070","url":null,"abstract":"Codebook design has been investigated extensively over the past few years for quantized precoding in Multiple-Input Multiple-Output (MIMO) communication system. Grassmannian line packing (GLP) codebook is widely used in industry and literature. Traditional GLP codebook can only show good performance in spatial uncorrelated channel. But the practical channel is with varied spatial characteristic. In order to design one codebook robustly adapted to arbitrary statistic channel, a novel codebook constructed through unitary rotation of Grassmannian Line Packing (GLP) codebook is proposed in this paper. The rotation enables some codewords belong to Discrete Fourier Transform (DFT) codebook, meanwhile keeps the GLP property unchanged locally. With the virtues of DFT codebook and GLP codebook, the proposed codebook can achieve good performance in both uncorrelated channel and correlated channel.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115230624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Performance Evaluation of DVB-T2 Time Interleaving in Mobile Environments 移动环境下DVB-T2时间交错的性能评估
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594599
D. G. Serrano, David Vargas, D. Gómez-Barquero, N. Cardona
{"title":"Performance Evaluation of DVB-T2 Time Interleaving in Mobile Environments","authors":"D. G. Serrano, David Vargas, D. Gómez-Barquero, N. Cardona","doi":"10.1109/VETECF.2010.5594599","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594599","url":null,"abstract":"This paper investigates the performance of time interleaving in DVB-T2 in the context of mobile reception. By means of time interleaving it is possible to provide time diversity and improve the robustness of the transmitted information in mobile environments. DVB-T2 implements a highly flexible time interleaving that allows different trade-offs in terms of time diversity, latency and power saving. DVB-T2 also includes the possibility to particularize the transmission parameters on a service basis by means of multiple physical layer pipes. This way, it is possible to accommodate different use cases: fixed, portable and mobile, in the same frequency channel. This paper evaluates the time interleaving capabilities of DVB-T2 by means of physical layer simulations. The paper also proposes and evaluates a configuration that has been optimized for handheld reception.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115392825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Cooperative Spectrum Sensing and Communication in Cognitive Radio Networks 认知无线电网络中的协同频谱感知与通信
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594274
Zhenzhen Gao, Shihua Zhu, Xuewen Liao, Jing Xu
{"title":"Cooperative Spectrum Sensing and Communication in Cognitive Radio Networks","authors":"Zhenzhen Gao, Shihua Zhu, Xuewen Liao, Jing Xu","doi":"10.1109/VETECF.2010.5594274","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594274","url":null,"abstract":"In cognitive radio systems, secondary users should continuously sense the licensed spectrum in case a primary user starts to transmit. Whether or not the secondary users can sense the spectrum during the secondary communication is an attractive problem. In this paper, we consider a particular wireless cooperative communication system acting as a secondary system, and demonstrate that by exploiting the cooperative property of the cooperative communication, the secondary system dose sensing while communicating. Compared with the conventional periodical sensing scheme, the proposed method achieves better sensing performance without any overhead. The theoretical analysis is given, and the sensing performance of the secondary system is investigated. Simulation results show that the sensing performance of the proposed method is improved significantly as opposed to that of the conventional spectrum sensing.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114814633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Max-Min Throughput-Optimal Multicast Link Adaptation for Non-Identically Distributed Link Qualities 非相同分布链路质量的最大最小吞吐量最优组播链路自适应
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594264
J. Huschke
{"title":"Max-Min Throughput-Optimal Multicast Link Adaptation for Non-Identically Distributed Link Qualities","authors":"J. Huschke","doi":"10.1109/VETECF.2010.5594264","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594264","url":null,"abstract":"We consider multicasting the same data from one base station (BS) to several user equipments (UE) over a radio interface. Transmission is slotted into transmit resource units (RU). The qualities of the transmission channels from the BS to the UEs differ between RUs and between UEs. The transmit rate can be chosen by the BS independently in each RU based on the per UE channel qualities, which are assumed to be known by the BS. For each UE we calculate the throughput as the mean information received per RU over all RUs within a scheduling unit. Here, the multicast throughput is defined as the minimum UE throughput. We present a scheme to optimize the rate selections for all RUs such that the minimum UE throughput is maximized, even in the general case that the channel qualities of UEs are non-identically distributed. The achievable gains are evaluated using radio net¬work simulations with realistic channel models.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114815411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Fairness Improvement of Maximum C/I Scheduler by Dumb Antennas in Slow Fading Channel 慢衰落信道中哑天线对最大C/I调度器公平性的改进
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594590
Xiaoyan Bi, Jia-Yan Zhang, Yi Wang, P. Viswanath
{"title":"Fairness Improvement of Maximum C/I Scheduler by Dumb Antennas in Slow Fading Channel","authors":"Xiaoyan Bi, Jia-Yan Zhang, Yi Wang, P. Viswanath","doi":"10.1109/VETECF.2010.5594590","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594590","url":null,"abstract":"Multiuser diversity is achieved by maximum C/I scheduler in both fast and slow fading scenarios. However, fairness among multiple users is not guaranteed in slow fading channel because time and frequency resource are always occupied by the user with largest signal to interference and noise ratio(SINR). Opportunistic beamforming using dumb antennas is a multiple antennas transmit technique to increase the fluctuation rate and dynamic range of effective channel coefficients in slow fading environment. In this paper, we propose a method to improve the fairness of maximum C/I scheduler with the technique of dumb antennas. The theoretical analysis of users' scheduling probability shows that the fairness of maximum C/I scheduler can be greatly improved by dumb antennas in slow fading channels without significant loss in cell spectrum efficiency. The engineering issues of its application in the downlink transmission of 3GPP LTE system are discussed. The numerical results of simulation with practical LTE configurations and assumptions also verify our proposal.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115860297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
A General Joint Transceiver Design for Multiuser MIMO Channel Equalization 多用户MIMO信道均衡的通用联合收发器设计
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594078
Baris Yuksekkaya, C. Toker
{"title":"A General Joint Transceiver Design for Multiuser MIMO Channel Equalization","authors":"Baris Yuksekkaya, C. Toker","doi":"10.1109/VETECF.2010.5594078","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594078","url":null,"abstract":"In this paper, joint transmitter receiver filter optimization for channel equalization is investigated for a multiuser multiple input multiple output frequency selective slowly varying channel. Minimum mean square error criterion is used in the equalization under a total transmit power constraint. Because of the simplicity of the optimization of multiple access channel, channel duality is used for the optimization problem and the solution is transformed to the broadcast, interference and MIMO frequency selective channels if required.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"80-81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123395242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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